Highlights from the Eighteenth Episode of Season 9 of NCIS

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. Sean Astin guest stars as Tyler Elliott. Pictured left to right: Mark Harmon, Jamie Lee Curtis, Michael Weatherly, Cote de Pablo and Sean Astin. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

The Secretary of the Navy partners Gibbs (Mark Harmon, right) with Dr. Samantha Ryan (Jamie Lee Curtis, left) after top secret information is leaked by someone on the inside, on NCIS. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. Pictured left to right: Mark Harmon and Rocky Carroll. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. Pictured left to right: Mark Harmon and Michael Weatherly. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

Behind the scenes with Michael Weatherly. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. Sean Astin guest stars as Tyler Elliott. Pictured left to right: Sean Astin, Michael Weatherly and Mark Harmon. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.

The Secretary of the Navy partners Gibbs with Dr. Samantha Ryan after top secret information is leaked by someone on the inside. Sean Astin (left) guest stars as Tyler Elliott. Pictured left to right: Michael Weatherly and Sean Astin. Photo: Monty Brinton/CBS ©2012 CBS Broadcasting Inc. All Rights Reserved.